korien_june26“Oh, she’s so fluffy! Is she a Persian?” 「あら、ふわふわしていますね!ペルシアンですか?」
“No, she’s just a run-of-the-mill mixed breed cat.” 「いいえ、そこらへんにいる雑種猫ですよ。」
“Oh? Well she’s still very cute!” 「そう?でもすごくかわいい!」


Something that is run-of-the-mill is not very special and doesn’t stand out much. A mill is a factory (especially one that grinds wheat into flour). The things it makes are all the same. None of them are very different or stand out.